Extension pole attachment for spray guns



March 1932. w. B. THOMPSON EXTENSION POLE ATTACHMENT FOR SPRA 'GUNS Oi-iginal Filed Jan." 15, 1926 Fly. 1.

Patented Mar. 15, 1932 UNITED STATES WAYNE IB. THOMPSON, OF WINCHESTER, MASSACHUSETTS EXTENSION POLE ATTACHMENT FOR SlfRAY GUNS Application filed January 15, 1926, Serial No. 81,379. Renewed September-26, 1931.

The present invention relates to spray guns and more particularly to spray guns having extension pole attachments by which the guns may be operated to s ray elevated surfaces without the use 0 ladders or staging.

The object of the invention is to produce a spray gun having an extension pole attachment which is easy to carry and which is 1 provided with means for controlling the elevated spray gun in a reliable and certain manner.

To the accomplishment of this object, and such others as may hereinafter appear, the

invention involves certain novel combinations and arrangements of parts and details of construction the nature of which will be readil understood from thefollowing de scriptlon of one embodiment of the invention and the novel features of which will be particularly pointed out in the appended claims.

In the accompanying drawings,

Figure 1 is an elevation of a spray gun supported on the extension pole attachment;

Fig. 2 is a detail in sectional plan showing the manner of supporting one of the bellcragnk levers on the handle of the spray gun, an

Fig. 3 is an enlarged detail showing various o crating positions of the control trigger o the spray gun and the bell-crank lever on the handle of the spray gun.

The spray gun 4 (Fig. 1) is the same as the spray gun disclosed in my Patent No.

' 1,706,006, March 19, 1929. As shown itis provided with a handle 5 which is shaped to'seat in one of the .hands of an operative.

The spray gun 4 is also provided with a control trigger 6 which is spaced from the handle 5 so that the trigger 6 maybe operated to control the coating material and motive agent valves (not shown) within the gun by f the fingers of the hand engaged with the,.

handle 5. The coating material and the mo tive agent, usually compressed air, are introduced into the gun through thecouplings 7 and 8, respectively.

When it is desired to use the spray'gun 4 to coat elevated surfaces the couplings -7 of threaded bolts 21 and 22 having,

and 8 are fitted respectively to the upper ends of a pair of metal pipes 9 and 10, one

of which may be flexible. The lower ends of the pipes 9 and 10 are connected respectively to the upper ends of at least one section of a pair of parallel pipes 11 and 12 which are connected at their lower ends to a casting 13. Several sections of the pairs of parallel pipes 11 and 12 may be joined together to increase I the height of the extension pole attachment. on The casting 13 is provided with an inlet coupling 14 for the coating material hose 15 and with an inlet coupling 16 for the air hose 17. The casting 13 is also provided with a rest 18 which engages the surface upon which the operative stands in order to prevent the coating material and air hose 15 and 17 from bending too sharply at their connections with the couplings 14 and 16. The pipes Hand 12 carry a spacing collar 19 to prevent the pipes from spreading at their upper ends. The pipes 9 and '10 are bent so that the spray gun will occupy usually a position'a-t an angle of forty-five degrees to the longitudinal axis of the pipes 1L and 12. In order to operate the control trigger 6 the handle 5 is embraced by a collar20 (Fig. ,4 2) which is clamped to the handle by a palr,

respectively, wing nuts 23 and 24. -The It 21 is longer than the bolt 22 so that a bell-crank lever 25 may be supported for pivotal movement on the extended portion'thereof. To

this end the bolt 21 is provided with a col lar 26 and the bell-crank lever 25 is interposed between the collar and a cotter pin 27 inserted through the bolt 21 near one end thereof.

The vertical arm of the bell-crank lever 25 I is provided with a pin 28 which engages the controltriggerG. The horizontal arm of the cell-crank lever 25 is connected to the upper end of a wire 29 the lower end of which is connected to the horizontal arm of a bellcrank lever 30 pivoted on a spring collar 31 which is clamped to the plpes 11 and 12 by a set screw 32. The vertical arm of the bell-crank lever 30 'isprovided with a plate or hand hold 33 which is engaged by one hand of the operative in operating the control-trigger 6 through the connections described to control the coating material and motive agent valves of the spray gun. These valves are opened against the tension of springs (not shown) within the gun so that when the hand hold 33 is released the parts are restored to their normal operative position.

In order to vary the operating stroke of the control trigger and thus vary the open ing of the coating material and motive agent valves provision is made for adjusting the operative engagement of the pin 28 and the trigger 6 longitudinally thereof. To this end the position of the clamp 20 on the handle 5 may be changed by unclamping the clamp 20, adjusting it to a new position on the handle 5, and reclamping it through manipulation of the wing nuts 233ml 24. This adjustment is made at a time when the collar 31 is loose and free to slide up or down on the pipes 11 and 12. When the clamp 20 is again clamped on the handle 5 the set screw 3:2 is tightened thus insuring that the proper tautness is imparted to the wire 29.

What isclaimed as new, is:

1. A spray gun, having in combination,

a body portion having means for admitting coating material and a motive agent, a handle integral with the body portion, a coating material and a motive agent control trigger pivotally mounted upon the body portion and spaced from the handle, a collar mounted to embrace the handle, bolts and nuts thereon for clamping the collar on the handle, and a bell-crank lever pivoted on oneof the bolts andhaving an arm to engage the trigger.

2. A spray gun, having in combination, a I body portion having means for admitting coating material and a motive agent, a handleintegral with the body portion, a coating material and a motive agent control trigger pivotally mounted upon the body portion and spaced from the handle, a bell-crank lever carried by the handle having one arm arranged to engage the trigger and an extension pole attachment comprising at least one section of a pair of parallel independent pipes, one for the coating material and the other for the motive agent, means for connecting the spray gun to the coating material and motive agent pipes at an angle thereto, and means for moving the lever to operate the trigger comprising a second bell-crank lever carried by the parallel pipes and a flexible connection interposedbetween the two bell-crank levers.

3. A. spray gun having, in combination, a body portion having means for admitting coating material and a motive agent, a handle integral with the bodyportion, a coating material and a motive agent control trigger pivotally mounted upon the body portion and spaced from the handle, a collar mounted to embrace the handle, and a bell-crank lever pivotally supported from the collar and havin an arm to engage the trigger.

4. X spray gun having, in combination, a body portion having means for admitting coating material and a motive agent, a handle integral with the body portion, a coating ma terial and a motive agent control trigger pivotally mounted upon the bodyportion and spaced from the handle, a collar mounted to embrace the handle, means for clamping the collar on the handle, anda bell-crank lever pivotally supported from the collar and having an arm to engage the trigger.

5. A spray gun having,in combination, a body portion having means vfor admitting coating material and a motive agent, a handle integral with the body portion, a coating material and a motive agent control trigger pivotally mounted upon the body portion and spaced from the handle, a collar mounted to embrace the handle and be moved into different positions thereon, and a bell-crank lever pivotally supported from the collar and having an arm to engage the trigger.

In testimony whereof I have signed my name to this specification.

WAYNE B. THOMPSON. 

